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Does nouveau supports powersaving, because if it doesn't do it and uses card in such way that it becomes hot then I consider such driver as hazardous for my hardware and I wouldn't be happy to have such support.

Nouveau uses the card in the way that it was designed, it certainly doesn't overclock anything.

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Usually I'm opposed to the idea of new technologies in an LTS release but given the obfuscated and ill maintained nature of the nv driver nouveau seems like it will be easier to support and get bug fixes.

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the article had a link to the feature matrix, which clearly says that power saving is "TODO". Good power saving depends on KMS and is harder to do than you might think. Especially if you don't have hardware docs.

I don't think the official nv driver has powersaving, either.

I also don't think it would affect your hardware's lifetime much if nvidia hadn't screwed a whole generation of their GPUs. A lack of powersaving should produce more heat and a higher electricity bill, but that's it.

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Does nouveau supports powersaving, because if it doesn't do it and uses card in such way that it becomes hot then I consider such driver as hazardous for my hardware and I wouldn't be happy to have such support.